Question

Explain the process of endosmosis with reference to the experiment of osmosis in raisins??​

Answer 1

When raisins are placed in water (a hypotonic solution), they absorb water by a process called osmosis and swell up. Osmosis is the net movement of solvent molecules from a region of their higher concentration to a region of their lower concentration through a semipermeable membrane.

Answer 2

Place some raisins in a bowl containing water. Leave the set up for a few hours.

Observation - The raisins swell up and some of them burst .

Reason - When the raisins are placed in water, the water in the bowl acts as a hypotonic solution and the content inside the raisins acts as a hypertonic solution . Therefore, the water molecules move from the region of their higher concentration (water in the bowl) to a region of their lower concentration and as a result , the raisins swell up. This movement of water molecules from a hypotonic solution to a hypertonic solution is called endosmosis.

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